Improvement in toy steam-engines



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ALBERT L. DEWEY, WESTFIELD, MASSACHUSETTS.

Letters Patent No. 85,572, dated Jamba/ry 5, 1869.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whom it rmty concern.-

Be it known that I, ALBERT L. DEWEY, of Vestfield, in the county ofHampden, in the State of Massachusetts, have Ainvented a new andimproved Toy Steam-Engine; and I do hereby. declare that the followingis a full, clear, and exactl description thereof, which Will enablethose skilled in the art to make and use the same, reference being; hadto the accompanying drawings, forming part f these `specications, inwhich- Figure l isL a vertical section of my invention, taken in theline x 1 fig. 2.

Figure 2 is a transverse section of the same, taken in the line e w,iig. l.

Figure 3 is a plan view of the cylinder with the steam-chest andvalve-seat removed.`

Figure 4 is a detached view of the valve-seat.

Figure 5 is an inverted view of the steam-chest.

Similar letters of reference indicate corresponding parts.

This invention relates to anew method of forming the steam-ways or portsto small steam-cylinders, whereby the same may be made in the casting ofthe cylinder in a cheap and simple manner, without employing baked sandcores, as is practised in the casting of larger cylinders, but which inthe case of very small ones would be impracticable. l

A represents a small steam-cylinder,

B is the steam-chest to the same.

O represents the ordinary slide-valve.

D is the valve-seat for the same.

E is the piston-head.

F is the induction-pipe.

G; is the edu'ction-pipe.

h` is the exhaust-steam way.

i. i are the ordinary steam-ways, communicating. with each end of thecylinder A.

jjj 'are the valve-ports. A

k k ,k la represent four screws, by which the cylinder, valve-seat, andsteam-chest are fastened together.

L'is the valve-rod.

The operation of this cylinder is the same as the ordinary ones incommon use, and consequently requires no further description.

The construction of this improvement is as follows:

- The cylinder A is cast with open or uncovered steamways or ports i hi, as shown in figs. 1, 2, and 3. The valve-seat D is made in a separatepiece from the cylinder A. It is formed or punched out of thinsheetmetal, and contains the three ordinary valve-ports jjj, as shown iniig. 4,*and it also serves to cover the open steam-Ways 'i h 'i in thecylinder A, figs. l, 2, and 3. This valve-seat is placed between thesteam-chest B and cylinder A. The three pieces A B D are held togetherbyfour or more screws 7c la k It, gs. 1,2, and 3.

As this toy is designed for instruction as well as amusement, it can beseen that, by the above-described arrangement, a person can obtain abetter idea of the construction ofthe steam-cylinder and its steam-portsthan could be obtained from th'e ordinary method of construction; for,by removing the four screws lok k k, the steam-chest and valve-seat canbe entirely removed from the cylinder A, leaving its steam-Ways i h texposed to view.

This arrangement also allows a much larger steamway to' be formed in asmall cylinder than could be obtained by the usual method ofconstruction.

Having now described the nature of my improvement, and the manner thesame is carried into eect,

some of its advantages I claim to be as follows:

First, simplicity and cheapness of its construction.

. Second, the facility by which a correct idea may be obtained of theform and direction of the steam-passages -by juveniles, and othersunacquainted with the construction of the steam-engine.

But I do hereby declare that I do not claim the wellknown arrangement ofthe steam-passages of a steamengine cylinder; neither dol claim thegeneral form of the cylinder, or the parts pertaining to the same, forthese are old and well known; but

What I claim as my invention, and desire to secure by Letters Patent,is-

The construction andarrangement of the parts composing thesteam-cylinder A of a toy steam-engine, as herein described Aand setforth.

. ALBERT L.; DEWEY.

Witnesses:

Geo. W. Rose, SAMUEL P. MARINUS.

